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05-10-2006 05:39 PM #1
CHR Member
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- Nov 2005
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- Bridgewater
- Car Year, Make, Model: '56 210, SBC
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Just pulled off the other valve cover. with both off, clean as a whistle, all moving ok w/no noise at all. oil looks super clean. The pop i'm reffering to could have been backfire or bad pop through the carb."I also have a tuner, the reception's not to good, but it works"
Phil...
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05-10-2006 07:15 PM #2
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- Car Year, Make, Model: '56 210, SBC
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Car idles much lower than before. Was at about 900 rpms in drive, now 400-500. Really cant figure this one out. Could I have damaged my carb? It seems I have no top end?"I also have a tuner, the reception's not to good, but it works"
Phil...
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05-10-2006 08:18 PM #3
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- Car Year, Make, Model: 57 chevy 2 dr wagon
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What condition is your timing chain in? If its orignal it could have slipped on the plastic? There has to be a reason for it running bad. Did you lose a plug on a vac. line??
Good luckCharlie
Lovin' what I do and doing what I love
Some guys can fix broken NO ONE can fix STUPID
W8AMR
http://fishertrains94.webs.com/
Christian in training
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05-10-2006 08:20 PM #4
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- Car Year, Make, Model: 57 chevy 2 dr wagon
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If you have automatic maybe the vac line is off at the trans???
Charlie
Lovin' what I do and doing what I love
Some guys can fix broken NO ONE can fix STUPID
W8AMR
http://fishertrains94.webs.com/
Christian in training
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05-10-2006 08:44 PM #5
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- Car Year, Make, Model: 1980 El Camino
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had pretty much the exact problem last summer with a 350... tried EVERYTHING before ripping it apart to find that the timing chain was badly stretched...
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05-10-2006 09:22 PM #6
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- Car Year, Make, Model: '66 Mustang, 76 Corvette
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You might also want to check the pushrods, they will bend at high rpm's.Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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05-10-2006 11:30 PM #7
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- Apr 2005
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- Car Year, Make, Model: 1966 Chevy Impala Sedan
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Well from what it sounds like, if you're idling lower than usual your timing could be way off, could have jumped a few teeth that is if your 283 is ALL ORIGINAL.. and if thats the case.. your camshaft timing gear has a few teeth missing by now. Why?
Well my friend bought my 283 off me. We tore it down. And guess what? GM decided to use a NYLON TOOTHED gear on the camshaft. Guess how many teeth were missing after 40 years? 11.
11 Teeth were missing. (See for yourself as to why I jumped timing!)
If thats the case, then you definately have jumped timing by alot; if the timing has jumped, then yes you could be experiencing the backfire through the carb due to being way off time. As for a hole in your piston? Smell your oil. See if you smell GAS. Gas has got to somewhere right?
I'd check my timing gear and chain first.
What about your Distributor Gear? I've never experienced a broken gear but.. maybe a tooth on it POPPED?
These are just some ideas and things to look into if the case is that your motor is original and untouched.
Untouched 283? Rebuild that sucker! It's a GREAT motor, it's very durable, reliable, and has thick cylinder walls, a stock build is relatively cheap and worth every penny.Last edited by Crowbie; 05-11-2006 at 05:24 AM.
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